_ registry / a2a + mcp http-sse · checked 32d ago

A2A Grocery

https://mcp.cpgknowledgegraph.ai

Registry code: bd309bc9234f78aa

api record

Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for retail grocery. This address began as the CPG Knowledge Graph (2026) and now serves the A2A Grocery door; records at a2a-grocery.ai, passports at a2a-passport.ai.

endpoint
https://mcp.cpgknowledgegraph.ai/mcp
door code
688b2130590188b0
protocol
http-sse ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is A2A Grocery live?
Yes — it answered the hub's last check (checked 32d ago). It answered 99% of checks over the last 30 days.
Is A2A Grocery free to use?
Yes — the hub reached it with no key and no payment.
What tools does A2A Grocery have?
19 tools: verify_gtin, get_product_documents, search_cleared_items, get_enforcement_watch, resolve_jurisdiction, resolve_actor, gate_transaction, get_item, ….
Is A2A Grocery safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
99%

90 days 99.2%· all time 98.8%

latency
85ms

last good check

priced tools
0

of 19 tools

_ answered our checks, 90 days 789 checks · signed record
  • degraded → live
  • live → degraded· timeout after 20000ms
  • degraded → live
  • live → degraded· timeout after 20000ms
  • down → live
_ what it is for
topic
productivity & business procurement & sourcing
used for
  • look up a consumer goods brand by gtin
  • find the maker behind a brand
  • find retailers carrying a brand
takes → gives
text → data
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
1

through this hub

calls served
1

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 19 tools
19 never probed 0 of 19 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • verify_gtin unknown never probed

    Product record from gtinfetch.ai (signed); hub layer: seat, market, claim, price, availability. Is this GTIN real, and whose is it? Check-digit validation, the GS1 prefix, and the validated record(s) that carry it on this hub with their brand, maker and claim status.

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    }
  }
}
    arguments 11 lines
  • get_product_documents unknown never probed

    Certificates and paper: the documents on an item record (organic certificate, PDO/PGI, halal, kosher, specification, allergen statement, origin declaration, lot where it applies), each a URL with its read date and source class; decision_id required.

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin",
    "decision_id"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 26 lines
  • search_cleared_items unknown never probed

    Find items cleared for this market: validated SKU records in a market (query by product name, brand, maker or category; filters: temperature ambient · chilled · frozen · fresh, attribute lane organic · free-from · plant-based · artisan · origin · premium, department). Only validated rows are served; each item carries its claim status, market status and source class.

    mcp-tool

    {
  "type": "object",
  "required": [
    "market"
  ],
  "properties": {
    "lane": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "limit": {
      "type": "integer",
      "default": 25
    },
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "market": {
      "type": "string"
    },
    "department": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "temperature": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "product_type": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 81 lines
  • get_enforcement_watch unknown never probed

    Recalls, withdrawals and food-safety alerts, dated: enforcement events by market, category, brand or since a date, each with its source page.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "since": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 38 lines
  • resolve_jurisdiction unknown never probed

    Where is this going? Resolve a ship-to (e.g. 'DE', 'US-CA', 'UK', 'FR', 'EU-NL', 'JP') to one of the 20 markets and its rule set (14 rule sets; the seven EU markets share one food-law set with national riders). UK is the label; machine fields carry the ISO code GB.

    mcp-tool

    {
  "type": "object",
  "required": [
    "ship_to"
  ],
  "properties": {
    "ship_to": {
      "type": "string"
    }
  }
}
    arguments 11 lines
  • resolve_actor unknown never probed

    Who is asking? Maker, brand owner, private label, distributor, importer, broker or retail buyer (trade only); auditor (read-only); agent (inherits the class of the credential it presents — none returns DENY_UNLICENSED_AGENT). The consumer is never the counterparty. Returns communication_class: trade_information or public.

    mcp-tool

    {
  "type": "object",
  "required": [
    "actor_class"
  ],
  "properties": {
    "credential": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "actor_class": {
      "type": "string"
    }
  }
}
    arguments 22 lines
  • gate_transaction unknown never probed

    Allow or deny, with the reason and the rule. Takes an item (GTIN or catalogue id; optional), the ship-to market, the actor class and, when no record exists yet, the product type, ingredients and claims. Returns one of twelve reason codes (ALLOW · REQUIRE_NOTIFICATION · REQUIRE_RESPONSIBLE_PERSON · DENY_NOT_PERMITTED_HERE · DENY_INGREDIENT_BANNED · DENY_INGREDIENT_LIMIT · DENY_CLAIM · DENY_MARKET · DENY_ACTOR_CLASS · DENY_UNLICENSED_AGENT · DENY_NO_GTIN · DENY_NOT_VERIFIED), the rule-set version, the source page and a decision_id for the downstream tools.

    mcp-tool

    {
  "type": "object",
  "required": [
    "ship_to",
    "actor_class"
  ],
  "properties": {
    "claims": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "channel": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "product": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "ship_to": {
      "type": "string"
    },
    "credential": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "actor_class": {
      "type": "string"
    },
    "ingredients": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "product_type": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 87 lines
  • get_item unknown never probed

    Product record from gtinfetch.ai (signed); hub layer: seat, market, claim, price, availability. One item by GTIN (EAN in European copy), fully resolved: temperature, department → super category → category, attribute lanes, pack, brand and maker, market, claim status, market status, availability; after the gate also ingredients, allergens, claims, origin, certificates, variants and offers.

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 33 lines
  • get_label_and_claims unknown never probed

    What the label must say, and which claims are allowed: the labelling requirements of the market (food information, allergens, origin, nutrition) and the claims rules of record (nutrition and health claims, organic, free-from), each with its source page. Optional claims are checked against the rules.

    mcp-tool

    {
  "type": "object",
  "required": [
    "market"
  ],
  "properties": {
    "claims": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "market": {
      "type": "string"
    },
    "product_type": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 36 lines
  • find_verified_buyer unknown never probed

    Retail buyer desks for this market: banner records (banner, parent group, channel discounter · e-commerce · local · in-store · traditional, local format, cited POS count or NULL, buyer desk by department) with their claim status — verified first, then claimed, then listed. Filters: channel, department. Takes the decision_id of an allow decision.

    mcp-tool

    {
  "type": "object",
  "required": [
    "market",
    "decision_id"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "default": 25
    },
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "market": {
      "type": "string"
    },
    "channel": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "department": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 52 lines
  • find_verified_supplier unknown never probed

    Verified makers, brand owners, private-label owners, distributors and importers for this item or category in a market: maker records with their claim status — verified first, then claimed, then listed. Takes the decision_id of an allow decision.

    mcp-tool

    {
  "type": "object",
  "required": [
    "market",
    "decision_id"
  ],
  "properties": {
    "gtin": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "lane": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "limit": {
      "type": "integer",
      "default": 25
    },
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "market": {
      "type": "string"
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 52 lines
  • log_audit unknown never probed

    Write a line to the audit record for a gate decision, an order intent or a handoff (returns the line id).

    mcp-tool

    {
  "type": "object",
  "required": [
    "kind",
    "reference_id"
  ],
  "properties": {
    "kind": {
      "type": "string"
    },
    "note": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "reference_id": {
      "type": "string"
    }
  }
}
    arguments 26 lines
  • get_price unknown never probed

    The price for this buyer: the price basis (list · contract · promotion window) from the maker's offers on the record, once gate_transaction has answered allow (decision_id). Plain $ on human surfaces. Tiers buy services, never rank.

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin",
    "decision_id"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 26 lines
  • get_availability unknown never probed

    In stock, and where: the availability block of an item (banners on the shelf of record, product URLs read live at load, POS counts where the banner record carries a cited one) once gate_transaction has answered allow (decision_id).

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin",
    "decision_id"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 26 lines
  • create_order_intent unknown never probed

    Open an order between two agents: an order intent for a cleared item after the gate; the intent carries reason_code + rule_set_version and settles by x402 on a2a-x402.ai.

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtin",
    "quantity",
    "decision_id"
  ],
  "properties": {
    "gtin": {
      "type": "string"
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "ship_to": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "quantity": {
      "type": "integer"
    },
    "decision_id": {
      "type": "string"
    }
  }
}
    arguments 41 lines
  • a2a_handoff unknown never probed

    Hand the buyer to the right agent over Agent-to-Agent (A2A): with an allow decision the order intent goes to the counterparty's agent (envelope + card URL); with a deny, the market agent of the ship-to — a referral, never a sale to a consumer.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "intent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "counterparty_card_url": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 38 lines
  • get_market_status unknown never probed

    Is this product type a food here, and under which regime? Product type by market: food, special class (novel food, food supplement, infant formula, fortified, organic-certified, alcohol excise) or not permitted — with the rule-set version and the regulator's page.

    mcp-tool

    {
  "type": "object",
  "required": [
    "product_type",
    "market"
  ],
  "properties": {
    "market": {
      "type": "string"
    },
    "product_type": {
      "type": "string"
    }
  }
}
    arguments 15 lines
  • get_notification_requirements unknown never probed

    What must be filed before sale in a market: the food business registration or import notification scheme, the food business operator of record, and, for a product type in a special class, the extra step (novel-food authorisation, organic certification, supplement notification) — each with its source page.

    mcp-tool

    {
  "type": "object",
  "required": [
    "market"
  ],
  "properties": {
    "market": {
      "type": "string"
    },
    "product_type": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 22 lines
  • compare_items unknown never probed

    Compare items, variants and pack sizes side by side (two to eight GTINs or catalogue ids).

    mcp-tool

    {
  "type": "object",
  "required": [
    "gtins"
  ],
  "properties": {
    "gtins": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "market": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "decision_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  }
}
    arguments 36 lines
_ try it over mcp through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your agent card — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id bd309bc9234f78aa.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/bd309bc9234f78aa/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/bd309bc9234f78aa/badge.svg)](https://brick.blue/agent/bd309bc9234f78aa?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we knowoff the a2a door
card completeness
90%

How much of the published card is filled in. Not a judgement of the agent — a measure of what it told the world about itself.

spec deviations
0

Places where the published card departs from the specification. Recorded rather than hidden, and counted against every agent the same way.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
1
ok
1
failed
0
success rate
100%
median latency
173ms
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

1 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.

_ also on cpgknowledgegraph.ai 1 entry

Served from the same domain, which is what was measured. Not a claim that one owner runs them: ownership is what a passport proves, and each of these says for itself.